- Henry Phillip Ehrlinger, Richard David Harvey, Ira Edgar Odom, James C. Bradbury, James C. Cobb, John Everts Lamar, M. E. Hopkins, Norman C. Hester, Ramesh Malhotra, Robert L. Major, Willis L. Busch, Bruce Forbes Bohor, Gordon S. Fraser, H. W. Jackman, Jack Aaron Simon, John M. Masters, Joseph Jerushalmi, Glenn Charles Finger, James Watson Baxter
· 1972
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Alan Martin Jacobs, Arthur Byron Leonard, Donald Clifford Bond, Gordon S. Fraser, Harold Bowen Willman, Hermann W. Pfefferkorn, Hubert M. Bristol, Illinois State Geological Survey, Ronald Arthur Landon, Theodore C. Labotka, William Hilton Johnson, Willis L. Busch, John C. Steinmetz, John Chapman Frye, John Paul Kempton, Richard David Harvey, Richard Henry Howard, Russel Allen Peppers, Paul C. Heigold, Tom Lee Phillips· 1971
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· 1986
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